BQ34Z651: Chemistry ID not stored in Data Flash

Hi There,

I have a battery system that used a number of different cell chemistries which therefore carry different IDs. 

I am using a bespoke program to manage the different configurations through which I update the data flash arrays of my systems as changes are made etc. I have deduced that the chemistry information is stored more or less in data flash subclasses 80-95 and while I don't understand what those subclasses represent I can see the changes in them between my different chemistry options. However when I re-write the data flash of systems (including this chemistry information) to change a system configuration from one chemistry to another the stored value of the chemistry ID (Manufacturer access 0x0008) is not changed when I do so. 

So my question is, what do I need to do to update the chemistry ID when I update the data flash? It seems to me like I am successfully re-writing the contents of the information stored in the data flash but not the ID itself. Am I missing something?

Thanks,

David